All vulnerabilities
CVE-2026-100909GHSA-2xmm-m4wv-3fjh

OctoberCMS ResizeImages.php getSourcePathForResize server-side request forgery

n/a OctoberCMSPackagistLibraries & packages
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 21% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.3.5Fixed versionOSV
Published28 Sep 2026Updated 29 Sep 2026CVE List

What fixes it

  • 4.3.5october/october, PackagistOSVcomposer require "october/october:^4.3.5"

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.

Text from CVE List

Affected versions 35

  • OctoberCMSaffected: 4.1.0CVE List
  • OctoberCMSaffected: 4.1.1CVE List
  • OctoberCMSaffected: 4.1.2CVE List
  • OctoberCMSaffected: 4.1.3CVE List
  • OctoberCMSaffected: 4.1.4CVE List
  • OctoberCMSaffected: 4.1.5CVE List
  • OctoberCMSaffected: 4.1.6CVE List
  • OctoberCMSaffected: 4.1.7CVE List
  • OctoberCMSaffected: 4.1.8CVE List
  • OctoberCMSaffected: 4.1.9CVE List
  • OctoberCMSaffected: 4.1.10CVE List
  • OctoberCMSaffected: 4.1.11CVE List
  • OctoberCMSaffected: 4.1.12CVE List
  • OctoberCMSaffected: 4.1.13CVE List
  • OctoberCMSaffected: 4.1.14CVE List
  • OctoberCMSaffected: 4.1.15CVE List
  • OctoberCMSaffected: 4.1.16CVE List
  • OctoberCMSaffected: 4.1.17CVE List
  • OctoberCMSaffected: 4.1.18CVE List
  • OctoberCMSaffected: 4.1.19CVE List
  • OctoberCMSaffected: 4.2.0CVE List
  • OctoberCMSaffected: 4.2.1CVE List
  • OctoberCMSaffected: 4.2.2CVE List
  • OctoberCMSaffected: 4.2.3CVE List
  • OctoberCMSaffected: 4.2.4CVE List
  • OctoberCMSaffected: 4.2.5CVE List
  • OctoberCMSaffected: 4.2.6CVE List
  • OctoberCMSaffected: 4.2.7CVE List
  • OctoberCMSaffected: 4.2.8CVE List
  • OctoberCMSaffected: 4.2.9CVE List
  • october/october, Packagistfrom 4.3.0, fixed in 4.3.5OSV
  • october/october, Packagistv4.3.0OSV
  • october/october, Packagistv4.3.1OSV
  • october/october, Packagistv4.3.2OSV
  • october/october, Packagistv4.3.4OSV

References 8